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Work done by gravity on a car rolling down a hill

Thread starter physicsmaster123
Start date Sep 9, 2023
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Energy Kinetic Work

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physicsmaster123

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Sep 9, 2023

#1

Thread moved from the technical forums to the schoolwork forums

I tried E =Fxcos0 but only ended up with 243kJ

Last edited by a moderator: Sep 9, 2023

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Ibix

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Sep 9, 2023

#2

What values of ##F##, ##x##, and ##\theta## did you use and why?

Ibix

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Sep 9, 2023

#3

Hint: What is the textbook definition of ##\theta## in the formula you stated?

Last edited: Sep 9, 2023

haruspex

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Sep 9, 2023

#4

physicsmaster123 said:

I tried E =Fxcos0 but only ended up with 243kJ

What distance in the diagram is ##50\cos(8°)##m?

hmmm27

Gold Member

Sep 9, 2023

#5

Specific to this exercise, ##W=\Delta E_P## is a better fit than ##W=Fd\cos \theta##

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